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<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>计算器</title>
<link rel="stylesheet" href="css/calculator.css">
</head>
<body>
	<table id="calculator">
		<tr class="top">
			<td>
				<span class="clear">C</span>
			</td>
			<td colspan="3">
				<div class="screen"></div>
			</td>
		</tr>
		<tr class="keys">
			<td>
				<span>7</span>
			</td>
			<td>
				<span>8</span>
			</td>
			<td>
				<span>9</span>
			</td>
			<td>
				<span class="operator">+</span>
			</td>
		</tr>
		<tr class="keys">
			<td>
				<span>4</span>
			</td>
			<td>
				<span>5</span>
			</td>
			<td>
				<span>6</span>
			</td>
			<td>
				<span class="operator">-</span>
			</td>
		</tr>
		<tr class="keys">
			<td>
				<span>1</span>
			</td>
			<td>
				<span>2</span>
			</td>
			<td>
				<span>3</span>
			</td>
			<td>
				<span class="operator">÷</span>
			</td>
		</tr>
		<tr class="keys">
			<td>
				<span>0</span>
			</td>
			<td>
				<span>.</span>
			</td>
			<td>
				<span class="eval">=</span>
			</td>
			<td>
				<span class="operator">x</span>
			</td>
		</tr>
	</table>
	<script src="js/calculator.js" type="text/javascript" type="text/javascript"></script>

</body>
</html>